Improvement in pumps



T. B. SWAN.

PUMR

No. 188,828. Patented March 27,1877'.

N- PETERS, PHOT-LUHOGRAPHER. WASHINGTON. D

PATENT OFFICE.

THOMAS B. SWAN, OF MINOT, MAINE.

'IMPROVEMENT |N PUMPS.

Specilication forming part of Letters Patent No. 188,828, dated March 27, 1877.; applicati: n filed January 19, 1877.

To all whom it may concern Be it known that I, THOMAS B. SWAN, of

Minot, in the county of Androscoggin andV State of Maine, have invented a new and useful Improvement Pumps, which improvement is fully set forth in the following specitication, reference being had to the accompanying drawings.

- The object of my invention is, by a doubleacting force-pump, which will not freege in the coldest weather, to rapidly force the water in a continuous stream to any reasonable height by the combination in a forcepump of two hollow pistons, A and B, and valves W, V, X, and M, and` apertures 3 and 4, to lei'J the water into said pistons, with the rod H and cross-piece I for moving said pistons up and down, and with the barrels O, F, E, and D, and tubes O and Y, which leads from the barrels into one common tube, N, as shown in the accompanying drawings. l

In turning the crank G the rod H is moved up and down, and the rod H being connected, by the cross-piece 1, with the two pistons A and B. When the rod H moves up and down it moves the pistons A and B in and outof the barrels 0,10, D, and E. When the pistons A and B move up, the valves W and X close, and the Water is forced from the barrels C and F into the tube Y, through the valve P, into the tube N, and at the same time lthe valves V and M open, and the water is sucked through the aperture 3 and 4 into the apertures l and 2 in the pistons A and B, thence through the valves M and V into the barrels D and E. When the pistons A and B move down, the valves V and M close, and the water is forced into the tube O, through the valve P, into the tube N, and at the same time the Valves W and 1X open, and the water is sucked through the apertures 3 and 4 into the apertures l and 2, in the piston A and B, thence through the valve W and X, into the barrels U und F.

The valves T and F both open up. K is a tube for the rod H. Q is a very small aperture, to let the water pass off, so that it will not freeze in the tube N. pump. The arrows show the direction that the water is forced.

I claim as my invention- The combination in a pump, substantially as described, ot' two connected hollow pistons and valves, and apertures to let the water into said pistons, with a single rod for moving both said pistons, and with four barrels and tubes leading' from said barrels to one common tube.

THOMAS B. SWAN. Witnesses:

' ELvA A. SWAN,

ALICE A. HAwKEs.

.i is the spout ofthe 

